Citation and License

Nanoscale Research Letters 2012, 7:255
doi:10.1186/1556-276X-7-255

Published: 15 May 2012

Abstract

Scanning tunneling spectroscopy (STS) was used to measure local differential conductance
(dI/dV) spectra on nanometer-size graphene islands on an Ir(111) surface. Energy resolved
dI/dV maps clearly show a spatial modulation, which we ascribe to a modulated local density
of states due to quantum confinement. STS near graphene edges indicates a position
dependence of the dI/dV signals, which suggests a reduced density of states near the edges of graphene islands
on Ir(111).